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Question
Write the chemical name of Lime water
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Solution
Calcium hydroxide Ca(OH)2
These droplets were present in the air as moisture which got condensed on the cooler walls of a glass tumbler. This shows the presence of water vapours in air.
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RELATED QUESTIONS
Give two uses of the following component present in air:
nitrogen
Give two uses of the following component present in air:
water vapour
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Air is a ______ of gases
State what do you understand by the term ‘air’. Explain its importance to mankind.
Answer in your own words.
What are the various constituents of air? Write their uses.
The capacity of air to hold moisture depends upon the ______ of the air.
State the meaning of the term Air
Match the statements in List I with the correct answer from List II.
| List I | List II |
| 1. The constituent of air which is around 0.02% | A: Nitrogen |
| 2. The constituent of air which is inert or unreactive | B: Oxygen |
| 3. The constituent of air which is non-combustible, but supports combustion. |
C: Sulphur dioxide |
| 4. A pollutant in air responsible for acid rain | D: Carbon dioxide |
| 5. The main rare gas present in air. | E: Argon |
______ is important for all living creatures.
Do sailors need the help of wind to sail?
